The abbreviation ‘MM’ stands for Major Medical – Major Medical is the provision of additional protection to meet the expenses of serious illnesses and accidents. These benefits are combined with the basic plan benefits to offer a more comprehensive coverage for major illnesses and accidents without which an insured would incur significant out of pocket expenses. Major Medical extends to coverage of all reasonable medical expenses and operates on a coinsurance basis, with the plan covering 80% of costs and the insured meeting the balance of 20% in some benefits of the plan.